JPS58190828A - Manufacture of expanded glass body - Google Patents

Abstract

PURPOSE:To manufacture an expanded glass body maintaining its heat insulating effect to be applicable to a floor or wall material, by laminating plural kinds of mixtures prepared by blending powdered glass with a blowing agent in different ratios, heating the laminate to a half-melted state, and expanding it. CONSTITUTION:>=2 Mixture layers are formed in a molding tool using >=2 kinds of mixtures prepared by blending powdered glass with a blowing agent in different ratios. The layers are heated and expanded in a half-melted state to form a highly expanded glass body layer A and a slightly expanded glass body layer B. A porous glass body consisting of the layer B as an upper layer and the layer A as an under layer can be obtd. by forming a layer of a mixture (a) having a higher content of the blowing agent as an under layer and a layer of a mixture (b) having a lower content of the blowing agent as an upper layer.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for manufacturing a foamed glass body comprising a highly foamed glass body layer and a low foamed glass body.

The foamed glass body obtained by the conventional method has a low density and is almost uniform, and is mainly used as a heat material. However, this glass foam has drawbacks such as low hardness and low permeability, and the reality is that it is hardly ever used for flooring or wall materials as building materials. Although it is possible to reduce the foaming ratio in order to increase the surface strength and strength, there are problems such as an increase in the cost per cell shell, a decrease in insulation performance due to the increase in the amount of honey, and a decrease in the foam glass itself. This results in many disadvantages such as an increase in weight.

The present invention was made in view of the above circumstances, and a mixture of two or more types of fc is arbitrarily heated to a semi-molten state to form a highly foamed glass layer. It is an object of the present invention to provide a method for producing a foamed glass body that maintains heat insulation properties and can also be used as a building material for flooring and wall materials by forming the entire low foaming glass layer.

In other words, the method for manufacturing the foamed glass body of Unexploded 111 is to put it into two or more types of mixed tables with different blending ratios of powdered glass and blowing agent, and then to mix the powdered glass and foaming agent. 21 tons with different proportions! ! More mixture layers? A highly foamed glass body is formed by heating the mixed material layer and foaming it in a half-bath melting state.
m (A) and a low-foaming glass body (provided) is formed. In case of misfire, I will threaten you! 8 bubbles Jj
Depending on the use of the lath, the mixing ratio of powdered wood glass and foaming agent can be changed as desired. The powdered glass may have a particle size of 3()0 mesh ff1lf. By changing the arrangement and insertion of the #l foaming agent, high foaming glass layers and low foaming glass layers with different expansion ratios can be formed with ease. or the blowing agent itself can react and emit gas or vapor, such as dolomite, calcium carbonate, magnesium carbonate, carbonate sorter,
Carbon substances such as carbon black, sulfuric acid sorter, etc. can be used, and these may be used alone or in combination of 1 m2 or more.

Two or more mixtures prepared by varying the blending ratio of the powdered glass and the blowing agent are used to provide molded pears with mixtures of 2I- or more having different blends of the powdered glass and the blowing agent on the order of 141J. Next, this mixture 1- is heated and foamed in a semi-molten state to form a highly foamed glass layer (A) and a low foamed glass layer (B). In other words, a mixture (a) with a high proportion of a blowing agent (for example, 5 to 6 parts per 95 parts of powdered glass) and a mixture (b) with a small proportion of a blowing agent ('fc and The mixture (a) layer is lowered by using powder glass (1 to 2 weights per 99 weights).
A mixture layer is provided with the mixture (b) layer on top of the first layer.
As shown in the figure, the upper layer is a low foam layer (B) and the bottom)
It is possible to form a foamed glass body which becomes a highly foamed glass body layer (5). Also, the mixture (al layer and mixture (b)
As shown in FIG. 2 at 7F, low foaming glass layers (t3) and high foaming glass layers (A) are alternately formed. In this case, l
In order to obtain a foamed glass body with high surface stiffness while maintaining all I+ thermal performance, low foaming glass f+ m (
It is preferable to provide the mixture layer so that B) serves as the surface layer, and the highly foamed glass layer (A) with a low density is placed below it. However, as shown in Figures 3 and 4, the mixture (
a) Layer total mixture (b) In the embodiment sandwiched between layers,
Then, various foamed glasses 1+ were prepared as mixture (a) layer, mixture (b) 11m, mixture (a) layer, and mixture (b) layer.
A slicing process may be performed so that 1 m (B) becomes the surface layer. - It also has the same rate as the conventional high foam glass body.

The thickness of the VC (made of low foam glass) that can be made to approximate the small foam glass body of Mitsuga consisting of a foam glass layer of - can be adjusted by adjusting the thickness. In the present invention, it is essential to heat the mixture layer to bring it into a semi-molten state and foam it. For example, the most common sorter glass powder book has a value of 700 to 80.
0°C is preferred. When foaming is performed with a completely poor bath melting state, diffusion mixing occurs between each mixture layer, and only a foamed glass body consisting of a single foamed glass layer can be obtained. In this way, the mixture layer is completely heated and foamed in a semi-molten state to increase the volume to obtain a desired density, and then cooled to produce a foamed glass body.As explained above, the method of the present invention In this method, two or more mixture layers with different mixing ratios of powdered glass and foaming agent are heated and foamed in a semi-molten state to form a high foaming glass lower layer and one low foaming glass body. The mixture layer is formed so that the low foam glass layer with 111F degree and high strength becomes the surface layer, or the low foam glass layer is sliced so that the low foam glass layer becomes the surface layer. The layer increases the surface hardness and strength, and the highly foamed glass material has a low density and improves the insulation performance, so it is not only the insulation material, but also the continuous UH
1I can be used as flooring and wall materials.
Examples of the method of the present invention, which can produce lSl glass f+, will be described below. Note that the present invention is not limited only to the following examples.

Example Sorter glass was pulverized to 300 mesh or less, and 2.5 g of domite was added to 95 parts of powdered sorter glass.
fi parts and 2.5 parts of carbon black were mixed and the mixture (al) was mixed with 1.0 parts by weight of domite and 1.5 parts of carbon black to the powder sorter Karasu 98 Shijuto.
Mix 0 parts by volume to prepare the mixture (bl). Next, the mixture (al) and (b, 3i
1:1 (1Tii ratio) i! Pour the mixture (al) I- into the upper trout and the mixture (bl) into the lower layer.
Layers were provided. Thereafter, this g8 phase mixture was placed in a heating furnace, and the mixture 1t4 was made into a semi-molten state at 700 to 800°C and foamed. After about 41 hours, slow cooling was performed for about 12 hours.

In this way, a foamed glass body consisting of a highly foamed glass body 1tim (AI) attached to the mixture (a13i-) and a low foamed glass body layer (B1) corresponding to the mixture (bl) layer was produced.

The condensation If, bending strength, and 1M pressure strength of the foamed glass body thus obtained were all measured. The results are shown in Table 1. For comparison, the same 6111 determination was carried out for the foamed glass body (A1) obtained only from the mixture (a1) and the foamed glass body (Bl) obtained only from the mixture (b+). The physical properties of J-crete (ALC), which is generally commercially available as a wall material, are also shown for comparison.

As can be understood from Table 1, highly foamed fiber material (A1
) has a low density and can be used as a heat insulating material, whereas 1 has a low strength and cannot be used for flooring or wall materials. The low foam glass body (B,) has high strength and can be fully used as flooring and wall materials, but its density tW is large and its insulation performance is poor. On the other hand, the foamed glass body obtained in the example of the present invention consists of a highly foamed glass body (AI) I- and a low foamed glass 1+ (B1)+-, and the foamed glass body (A,
) layer improves insulation performance, contributes to weight reduction, and increases strength of the low foam glass (Bl) layer. The foamed glass body of this example can be used not only as a heat insulating material but also as a building material for flooring and wall shelters. This can be understood from the fact that the physical properties are superior to that of ALC.

[Brief explanation of drawings]

Figures 1 to 4 show the results obtained by the method of the present invention, respectively. It is a complete sectional view of the vitreous body, in which (A) is a highly foamed glass layer and (B) is a low foamed glass layer. 155

Claims (1)

[Claims] +1) The blending ratio of powdered glass and foaming agent is different2
Mixture for more than individual use? Pour the mixture into a mold and form two or more mixture layers with different mixing ratios of powdered glass and foaming agent.The mixture layer is heated and foamed with semi-molten granite to form a high foaming glass layer and a low foaming glass layer. 1. A method for producing a foamed glass body, comprising forming a layer.